EPO vs TIPO

The European Patent Office's Open Patent Services (OPS) exposes bibliographic, legal-status, full-text, and image data drawn from Espacenet and the European Patent Register through a RESTful, XML-based interface secured with OAuth2 client-credentials. Non-paying registered users get up to 4 GB of data per week for free, with a EUR 2,800 annual subscription available for higher volumes. A live request to the OPS host returned a fair-use-quota rejection while still echoing the requesting Origin in its CORS headers, confirming cross-origin access is genuinely enabled rather than merely documented.

Taiwan's Intellectual Property Office (TIPO) publishes patent gazette, application, priority, annuity, and rights-transfer records through a REST API now hosted at cloud.tipo.gov.tw, after the old tiponet.tipo.gov.tw gazette pages were retired in favor of a unified Patent & Trademark Open Data portal. Every call needs a free verification token issued by TIPO and can return JSON or XML; without a valid token the API still answers with representative sample records rather than an outright error. A live request against the actual query endpoint came back with no CORS header at all, so browser-side cross-origin calls are blocked even though the separate spec-download endpoint does allow them.